This article will guide you through the process of establishing SPF for Zendesk. Setting up SPF for Zendesk can help emails pass DMARC alignment when SPF passes and aligns with the From domain, as well as boost your domain's reputation with ISPs, Minimising the possibility of spam complaints.
v=spf1 include:mail.zendesk.com -all
In case you already have an SPF record in your DNS and you just need to modify it to include Zendesk, then you can simply publish the following:
v=spf1 include:_spf.zoho.com include:mail.zendesk.com -all
Sign in to your DNS management console
Go to your desired domain
Identify your resource type: TXT
Check for SPF records.
Paste the value of your generated SPF record
Save changes to configure SPF for your domain
Make sure you have only a single SPF record configured for your domain on your DNS, since multiple SPF records can invalidate your SPF record and lead to SPF failure.